GRE Prep Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
The figure above shows a normal distribution with mean m an
[#permalink]
25 Aug 2020, 07:39
25 Aug 2020, 07:39
Expert Reply
00:00
Question Stats:
92% (00:50) correct
7% (00:51) wrong based on 40 sessions
Hide Show timer Statistics
Attachment:
GRE The figure above shows a normal distribution with mean m and standard deviation d.png [ 11.88 KiB | Viewed 8152 times ]
The figure above shows a normal distribution with mean m and standard deviation d, including approximate percents of the distribution in each of the six regions shown. For a population of 4000 students in a university, the heights of these students are approximately normally distributed with a mean of 67 inches and a standard deviation of 4 inches. How many of the students had heights between 71 and 75 inches?
A. 80
B. 560
C. 1120
D. 1360
E. 1920
Re: The figure above shows a normal distribution with mean m an
[#permalink]
25 Aug 2020, 07:40
25 Aug 2020, 07:40
Expert Reply
Post A Detailed Correct Solution For The Above Questions And Get A Kudos.
Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
For more theory and practice see our GRE - Math Book
Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
For more theory and practice see our GRE - Math Book
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: The figure above shows a normal distribution with mean m an
[#permalink]
25 Aug 2020, 09:24
25 Aug 2020, 09:24
1
1
Bookmarks
Carcass wrote:
Attachment:
GRE The figure above shows a normal distribution with mean m and standard deviation d.png
The figure above shows a normal distribution with mean m and standard deviation d, including approximate percents of the distribution in each of the six regions shown. For a population of 4000 students in a university, the heights of these students are approximately normally distributed with a mean of 67 inches and a standard deviation of 4 inches. How many of the students had heights between 71 and 75 inches?
A. 80
B. 560
C. 1120
D. 1360
E. 1920
The heights of these students are approximately normally distributed with a mean of 67 inches and a standard deviation of 4 inches.
Add this information to the diagram to get:
How many of the students had heights between 71 and 75 inches?
From the diagram, we can see that 14% of the heights are between 71 and 75 inches
14% of 4000 students = (0.14)(4000) = 560
Answer: B
Cheers,
Brent
